Modified Mustangs & FordsHow To Engine
Painless Performance EFI
Getting EFI for your vintage Ford is easy with the right parts
With gasoline prices going through the roof, everyone is looking for ways to get better fuel mileage and still have enough power to get their classic Ford onto the freeway. The drivability of a new car is always preferred when compared to the old pump the accelerator, pull the choke, and hope it starts method. By the same token, we like the thought of smooth power via the new electronic fuel injection (EFI) when power adders are applied.
Lance Overholser was in that situation with his '64 Ford Custom 300. The car came from the factory with a 289 engine, two-barrel carburetor, and a three-speed transmission. On a typical day, it would get around 15 mpg. Not really all that bad for a fullsize car, but he wanted better. He also wanted to boost the performance down the road.
An idea struck--why not put an EFI unit from a 5.0 onto the 289? The hunt was on for the hardware. An EFI unit was found perched on a '87 Mustang that seemed to be in nice shape. Lance then visited his local Ford Racing dealer, ordered a computer kit that included a mass airflow sensor, and a relay kit that included oxygen sensors and a barometric pressure sensor. The last major item needed was a wiring harness, so Lance contacted Painless Performance and obtained their 5.0 (60510) harness designed for the '87- '93 engines. With all the basic parts now on hand, it was time to start the process of putting it all together.
Lance contacted the tech guys at Painless, and they volunteered to come help on the project since it was being done in the Fort Worth area.
The following will show the steps taken for the assembly and testing.